Box-making machine.



Patented-Dec. 1. 1914.

15 SHEETS SHEET 1 O. BURNHAM.

BOX MAKING MACHINE.

I APPLICATION FILED NOV. 29, 1912. 1,1 19,341

Patented Dec. 1. 1914.

15 SHEETS--- SHEET 2.

C. BURNHAM.

BOX MAKING MACHINE.

APPLICATION FILED NOV. 29, 1912.

Patented Dec. 1. 1914.

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In ueniv a i I o "nZey Bun-0.71am "3 p/w qw o 2 {g C. BURNHAM.

BOX MAKING MACHINE.

APPLICATION FILED NOV. 29, 1912. I

Patented Dec. 1. 1914.

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BOX MAKING MACHINE.

APPLICATION FILED NOV. 29, 1912.

Patented Dec. 1. 1914 15 SIIBE1'S---SHEET G.

Patented Dec. 1. 1914.

C. BURNHAM.

BOX MAKING MACHINE.

APPLICATION rum NOV. 20, 1912.

1,11 9,341 Patented Dec. 1.1914.

15 SHEE'IS---SI1EET 8.

1 3 f4 I we 11 ['03 0. BURNHAM. BOX MAKING MACHINE.

APPLIUATION FILED NOV. 29, 1912.

Patented Dec. 1, 1914.

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QWHU m. (1/3 Mb/W C. BURNHAM.

BOX MAKING MACHINE.

Patented Dec. 1. 1914.7

15 SHBETSSHIIBT 1U.

APPLICATION FILED 11017.29, 1912.

C- BURNHAM.

BOX MAKING MACHINE.

APPLICATION TILED N0v.29,1912.

1, 1 1 9,3 11 Patented Dec. 1,1914.

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O. BURNHAM.

BOX MAKING MACHINE.

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BOX MAKING MACHINE.

APPLICATION FILED NOV. 29, 1012.

Patented Dec. 1. 1914.

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C. BURNHAM. BOX MAKING MACHINE.

APPLIUATION FILED NOV. 29, 1912.

Patented Dec. 1. 1914..

15 SHEETSSHBET 14.

lll llll hamfes Bur/thaw $513M aflo'cuurv QNN NR. wan m Rm \\m man mm Q m M Na m \m NN. RM n wmm m RM WMV m a in \Rw Rm W 1 wk inn l Q svm m JW w 1 hn rum n. fu .fiur A vxm mw um NR. m .F wk m? G. BURNHAM. BOX MAKING MACHINE. APPLICATION FILED NOV. 20, 1912.

Patented Dec. 1. 1914.

15 SHEETS-SHEET 15.

ran srnrns PATENT onnron.

CHARLES BURNHAM, 0F LOS ANGELIES, CALIFORNIA, ASSIGNOR, BY MESNE ASSIGN' MENTS, TO BURNHAM BASKET COMPANY, A CORPORATION OF CALIFORNIA" BOX-MAKING MACHINE.

Specification of Letters Patent.

Patented Dec. 1, 1914.

Original application filed December 26, 1908, Serial No. 9,250. Divided and this applicationfiled November 17 0 all whom it may concern Be it known that 1, CHARLES BURNHAM, a citizen of the United States, and a resident of Los An eles, county of Los Angeles, and State of alifornia, have invented certain new and useful Improvements in Box-Male ing Machines, of which the following is a full, clear, and exact description.

This invention relates more particularly rectangular form corresponding to the shape of the open edge of the box body to which the binding is to be applied, and to clench or apply the said binding to the body in order to hold the parts of the body together.

Another object of the invention is to provide simple metallic binding may be automatically fed from a roll or as along strip and'the said strip cut and formed and bent lengthwise and transversely, and the said strip reformed to adaptthe ends to overlap andlie substantially flush, and such binding and a box 'body automatically brought together and the binding clenched to the box body or to any other object to which the binding may be applied.

Other objects of the invention are to provide simple. means whereby a metallic strip be automatically fed from a roll; to provide simple means for accurately feeding the strip of binding metal; to provide simple means for bending the metal strip lengthwise and for tilting the binding metal; and to provide simple means for cutting the folded binding metal and for bending the same transversely.j

A further object of the invention is to provide simple and efiicient means for supporting the binding on an anvil and forlautomatically releasing the binding .metal holding means. I i

A still further object of the invention is to provide simple and efiioient means Where by' the binding metal may be stnippediirom may and efficient means whereby a .jllstable cam Serial No. 734,153.

the anvil or other means which forms the bind ng metal into a rectangular form.

With these and other objects in view, the invention will be hereinafter more particularlydescribed with reference to the accompanying drawings, which form a part of this specification, and will then be pointed out in the claims at the end of the description.

In the drawings, Figure 1 is a front perslpectlve taken from the operators side of t e machine and looking in the direction indlcated by arrows 1, Figs. 3 and 5. Fig. 2 is a rear perspective looking in the direction indicated by arrows 2, Figs. 3 and 5. Fig. 3 1s a perspective of the binding metal end of the machine indicated by arrows 3, Figs. 1, 2 and 5, the roll of binding metal and the bindln metal finishingmechanism being omitte Fig. t is an enlarged detail, partly in section, of the mechanism for coatmg the binding metal. Fig. 5 is a top plan in perspective, indicated by arrows 5, Figs.

1, 2 and 3. Fig. 6 is an enlarged rear elevatron of the binding metal finishing mechanism and the reel of binding metal indicated an enlarged fragmentary top plan of the mechanism for feeding, centering, folding,

and, tilting'the binding metal, indicated by arrows 8, Figs. 1, 2, 3 and 9. Fig. 8 is a fragmentary I orming a part of the mechanism shown in Fig. 8. Fig. 9 is an enlarged front elevation of the parts shown in Fig. 8,

indicated by arrow 9, Figs. 3, 5 and 8. Fig;

1 O is-an enlarged fragmentary, rear elevation of the mechanism for centering, foldmg, and tiltingthe-binding metal, indicated by arrowslll, Figs. 5 and 11. Fig. 11 is a vertical cross-section of the parts shown in Fig. 10 and taken .on the line XI-XI .of

Figs. 2, 5, 8, 9 and 10. Fig. 12 'is an enlarged vertical cross-section of the mechanism for centering and folding the binding metal taken on the line XIL-XII of Figs.

erspective detail of the ad.

2, 5, 8, 9 and 10, and showing the centering mechanism and the foldin mechanism open. Fig. 13 is a view sim or to Fig. 12 and showing the centering mechanism closed and the folding mechanism open with M the binding metal in-a-central position ready horizontal to be folded. Fig. 14 is a view similar to Figs. 12 and 13 and showing the folding mechanism closed. Fig. 15 is an enlarged cross-section of the mechanism for tilting the folded binding metal, taken on the line XV XV ofFig. 8. Fig. 16 is a horizontal section through the binding metal folding and centering mechanism. Fig. 17 is a section taken on the line XVII-XVII of Fig. 18. Fig. 18 is a vertical section taken on the line XVHL-XVIII of Fig. 17. Fig. 19 is a cross-section taken on the line XIXXIX of Figs-17 and 18. Fig. 20 is a rear fragmentary detail of the mechanism for feeding the binding metal intermittently, and

indicated by arrows 20, Figs. 3, 8 and 21. Fig. 21 is a cross-section taken on the line XXI-XXI of Fig. 20. Fig. 22 is a 24, and showing the parts in another position while forming the binding. F ig.. 26 is a vertical. cross-section taken on the line XXVI-XXVI of Figs. 1,2, 5, 22, 23, 29 and 30. Fig. 27 is a side elevation of apart of the mechanism shown in Fig. 26, and indicated by line XXVII-XXVII of 3 Figs. 2, 5, 22, 23 and 24. Fi 28 is a frag- 'mentary vertical longitudina section taken on the line XXVIII XXVIII of Figs. 17, 18, 23. and 24, showing thepassage of the binding metal from the folder through the tilter, cutter, and reformer to the benders. Fig. 29 is a vertical cross-section taken on line XXIX-XXIX of Figs. 24, 25, 26 and 32. Fig, 30 is 'a side elevation of the parts seen as indicated by the arrow in Figs. 5,

, 22, 23, 25 and 26. Fig. 31 is a vertical sectional detail on line XXXIXXXI of Fig. 25. Fig. 32 is a horizontal sectional detail on lines XXXII-XXXH of Figs. 29, 30 and ,42, said figure being a plan of the, folded binding held in place upon the I anvil ready to be applied to the basket body.

'Fig. 33 is an enlarged perspective of one of.

the vertically reciprocating posts for-opcrating one of the bender jaws. Fig. 34 is a vertical sectional detail on line XXXIV XXXIV- of Figs. 25 and 33. Fig. 35 is a sectional detail upon an enlarged scale on line XXXV-XXXV of Figs. .25 and 30, with a part of one of the clenchers added to illustrate the operation of overlapping the ends of the folded bind- .mg and'showlng the operation nearly completed. Fig. 36 is a view similar to Fig. 35

and showing the operation of overlapping the ends of the folded binding completed in full lines, and showing the beginning of the operation in dottedlines. Fig. 37 is a horizontal section on lines XXXVII XXXVII of Figs. 42, 43 and45. Fig. 38 is a horizontal section upon line XXXVIIIXXXVIII of Fig. 42. Fig. 39 is a horizontal section taken on line XXXIX-XXXDC of Fig. 42. Fig. 40 is a detail plan and Fig. 41 a side elevation of the completed binding nietal. Fig. 42 is' an enlarged sectional elevation illustrating the punch and dies andshowing the punch elevated to receive thebinding upon the anvil and to receive the die carrying thebody material, and taken on lines XLII-XLII of Figs. 1, 2 and 5. Fig. 43 is a view similar to Fig. 42, thedie mechanism being omitted and showing the parts slightly advanced. Fig. 44 is a view analogousto Fig. 42, the upper part of the mechanism being'broken away and showing the; punch downin the die with the box formed and the binding in position to be applied to the-edge of the box. Fig. 45 is a View similar to Fig. 42, showing the com-' pletion of the operationof forming the box and applying the binding thereto. Fig. :46 is a sectional plan of the mechanism for strippinggiie box from the punch and taken on lines XLVII XLVII of Fig. 46. Fig. 48 is a View similar to Fig. 47 and showing the parts in another position. Fig. 49 is a view" VI-XLVI of Figs. 1, 2 and 47.

Fig. 47 is a sectional elevation on line' similar to Figs. 47 and 48, and showin'gthel completion of the operation; and Fig. 50.is'

a fragmentary horizontal section taken on line LL of Fig. 47.

While I show the featuresof the invenchine, it will be understood that many of the features may be used in connection with other forms of machines and that some of the partsmay be dispensed with or other features substituted therefor without dea'metallic strip is fed from a reel or other-' I wise suitably supported convenient to the machine, and this strip by suitable mechanism is fed to what I term forming mechanism, that is the metal is folded or formed lengthwise thereof so as to be substantially V-shaped in order to fit overthe edge .of the box form. This strip is fed inwardand tilted and after being tilted so that it will assume a proper position relative. to the edges of the box and the anvil or former about which it is bent according to. the shape of the box, the strip is then cut off the proper length. The strip is. then fed forward on one side of a substantially-rectangular anvil 105 tion as applied to a particular form of mahaving a shape corresponding to theshape' of the open end of the box and until the said strip meets the 'anvil,when the j aws into which thestrip has been previously fed by engage ment with the former or anvil will bend both ends of the strip on opposite sides thereof making the same substantially U-shaped. A second pair of jaws engages the free ends of the binding strip and forces the same on the remaining side of the anvil and causes one end of the strip to overlap the other. The shooks of which the box body is made are placed in two magazines located adjacent to one end of the machine and these shocks are automatically fed upward in position to be removed therefrom. A reciprocatory and rotary vided for this purpose and this device is automatically controlled so that the shocks will be picked up first from the magazines and the shot ks caused to lie crosswise and at the base 5.. of the machine.

automatically ejected .the shaft-.7; .shaft 10 to the pulley 8; a frame 11 pivotally substantially right angles to each other. The shocks are folded int box form by suitable die and punch mechanism and the upper edge of the box form is forced into the viously formed binding metal. The binding metal is then pinched on to the shocks thus holding the shocks permanently together in box form. Mechanism is provided for stripping the box and causing the completed box to be carried out ofthe way and from the machine. The stock of binding metal 1 is wound upon a spool or reel 2, and the spool s mounted upon a spindle 3 pro ect1ng llOIlzontally from near .the center of the post or standard 1, said post being mounted upon This binding metal is a flat strip of the proper width to make the binding of the box and of a length sufficient to bind a number of boxes or baskets.

The mechanism Afor advancing the bind: ing metal comprises a bearing block 6 mounted upon the base 5; a shaft 7 1n the bearing block; a large driving. pulley 8 upon a belt 9 connecting the driving ,mounted upon the shaft 7 a pulley 12 carried by the freeend of the frame 11; a belt 13 extending around the pulley 12 and around the pulley 14 upon the shaft 7; the guide roller 15 carried by the upper part of the main frame; the cable 16 connected to the frame 11 and extending upwardly over the guide roller 15; and the weight 17 attached to" the cable; so that the belt 13 w ll engage thebinding metal 1 upon the spool 2 and the weight 17 will pull the frame 11 so upwardly to hold the belt 13 against the metal and rotate the spool to im- 7 b ndin windt rebinding metal just fast enough to ,furnish the required amount of binding metal for the boxes.

b The mechanism Bifor finishing .the bindpneumatie device is pro-.

paratively high' rate of .ing metal comprises a butting wheel 18 and suitable means for operating the builing wheel mounted upon the post 4; a bra iket 19 extendin from the post 4 under the butting wheel 18, bifurcated arms 20 and 21 mounted upon the pivot 22 carried by the bracket 19, said bracket being bifurcated to receive the arms; the guide rollers 23 and 24 mounted between the bifurcations of the arms 20 and 21 upon spindles; and the retractile coil spring 25 connecting an ear upon the arm 20 with an ear upon the arm 21; so that the binding metal 1 will pass upwardly over the guide rollers 23 and 24 and be pressed yieldingly against the bailing wheel 18 so as to buff and finish the upper surface of the binding metal as it passes to the machine to be used. H

The bifurcations of the arms 20 and 21 are connected closely across the tops of the guide rollers 23 and 24 so as to guide and old the binding metal in place upon the guide rollers. The buihng wheel 18 may be run in the direction indicated by the arrow in Fig. 7, so that v wheel upon the binding metal will tend to draw the binding metal from the spool as fast as the spool is operated by the mechanism A to unwind the binding metal.

. The base 5 supports the entire machine, and the superstructure of the frame a is supported upon posts 25. 26, 27, 28 and 29 securely mounted upon the base 5.. The driv' ing shaft 10 is mounted horizontally longitudinally of the base, and in bearings sup ported by the posts 25326 and 27. The drive wheel 30 is loosely mounted upon the shaft 10 near the center of the machine and may, be connected to theengine, motor or other source of power by a belt. A fiy wheel 31 is fired upon the shaft 10 near the drive wheel, and a'clutch mechanism 32 is mounted upon the shaft and is controlled by the operating lever 33 which connects the drive wheel 30 to and disconnects the same from the shaft 10. The operating lever is connected at its lower end to the base by the pivot 34:, and the central portion of the opcrating lever is bifurcated to receive the clutchmechanism-32 and is connected to the clutch mechanism by the pivot pins 35, so that when the upper end. of the lever which serves as a handle for the operator is moved one way the machine is started, and when the lever is moved the other way the machine is stopped. The front side of the machine as shown in Fig. 1, is the operators side of the machine, and the handle 33 of the operating lever is in convenient position for use from that position. The driving shaft 10 runs at a comspeed, and the shaft 7 is set at right angles to the driving shaft. The binding metal is fed at a comparatively slow speed, and

the belt 9 is crossed to run ISU from the shaft 10 to the ulley 8. This ley 8 is large and the. be t 9 is made to run directly upon the shaft so as to drive the shaft 7 at much slower speed, and the pulley 5 14 is small so as to drive the belt 13 at a lower rate of-speed. It is obvious that all of these proportions must be studied and timed so as to feed the binding-metal at a speed equal to the demands of the machine. A large number: of the motions of the machine are derived directly'from the cam shaft 36, said cam shaft being mounted vertically near the center of the machine. A helical toothed gear 37 is fixed upon the lower end of .the cam shaft and meshes with the Worm 38, Fig. 2, upon the driving shaft 10.

The mechanism B- for wiping the finished bindin metal is shown in detail in Fig. 4. A box is mounted upon the side of the frame a and comprises the bottom 7; for the binding metal 1 to rest uponas it passes to the -machine-, a flaring mouth 0 leading to the bottom 6, said box containing waste or other 5 suitable wiping material (2, and therebeing a removable side plate e held in place by wing nuts to provide access to the wiping material. An ad'us'table pressure plate f is regulated by the eed screw 9 so that the tension of the Wiping material upon the binding metal-may be regulated, and -so'that the wiping material may be removedand renewed; the object of this wiping material being to remove all the dirt from the binding metal before it passes into the lacquer as willbe presently described.

The mechanism B for coating the binding metal is shown incnlarged detail in Fig. 4. Lacquer or other coating may be used. The lacquer can It is mounted upon the frame a directly in front of the mechanism B, and the can is provided with an air-tight I filling nimole z and a suitable air-tight drainvalve. The lacquer an 70 is mounted below the can it upon the side of the fr'amea, said pan being normally open at the top; and the pipe 70-" leads from the drain valve (not shown) into the pan is, the receiving end of the pipe being open and a feed-adjusting tube is adjustably mounted upon the nipple of the drain valveso as to provide a student lamp feed from the lacquer can it to the lacquer pan is, thereby maintaining thedesired level of lacquer 0 in the pan is. As the lacquer is used and. the level lowered, air

will be admitted to the can it through the drain valve, thereby releasing more lacquer. A guide roller 7) is mounted in position to depress the binding metal 1 into the lacquer 0 in the pan is so that as the binding metal is advanced into the machine it is submerged in lacquer. v

' The mechanism B for wiping the coated binding metal is shown in enlarged detail in.

Fig. 4. The wiper base 9 is secured to the channel (not shown) is cut in the face 'of the base in the line of travel of the binding metal 1. Leather wiping pads s and't are mounted in the bottom of the channel 'with' the binding metal passing-between the pads after itleaves the lacquer o. A clamping 1 plate u issecured to theside of the base 9 I by the cap screw 1 providedwith an operating handle '20, and a finger it extends from the clamping plate it behind" the wiping pads s and t against the edge of the binding metal to hold the binding metal in line. A presser and is held adjust-ably in position byjthe adjusting screw a, so that. the pressure of the wiping pads a and 6 upon the binding metal -may be regulated by manipulating the screw The mechanismC. for feeding the binding metal intermittently comprises the eccentric sleeves 39 and 40, Fig. 20, mountedtransversely and in parallel position; the

.plate 3/ is mounted upon the wiping pad 8 r interlocking teeth Hand 42 for connecting I the sleeves together; thecompression shafts 43 and 44 rotatably mounted in the'eccentr'ic sleeves; the gears 45 and 46 connecting.

the shafts together; the compression feed rollers 47 and .48 ufpon the opposite ends of the shaft; means r drivingthe compression shaftsand means for operating the eccentric-sleeves. A bevel gear 49 is fixed upon one of the "compression shafts and meshes 'with thev bevel gear 50 upon the countershaft 51, and. a sprocket chain 52 connects a sprocket wheel upon the counters shaft 51 with a sprocket Wheel u on the driving. shaft 10,,so as to rotate. t e compression feed rollers 47 and 48 continuously when the driving shaft is running. The

teeth of the gears 45 and 46 are long enough to retain them constantly in mesh even when the shafts '43 and 44 are operated to separate the compression feed rolls. A pair of teeth 53 pro ect downwardly from the eccentric sleeve 40, a lever 54 being mounted upon a pivot 55 transverselyofthe machine with one of its eudslloosely-held between the teeth 53. An adjustable cam 56 is fixed upon the cam shaft 36, said cam having an outerconcentric peripheralsurface 57 andan inner concentric peripheral surface '58.

The connecting rod .59 is'forkd at one end v to slide upon the cam shaft 36 under the cam 56, and a roller 60. mounted upon the connecting rod engages the cam surfaces.

57 and 58" so asto reciprocate the connecting rod by the rotation of the cam shaft. The connecting rod 59 is bored at the opposite end from ,the cam shaft 36 to receive the sliding extension 61, and this slidin e'xtension is connected to the lever 54 y a may be regulated.

67 connects the connecting rod .39 to the extended position.

bolt 62. An adjusting rod 63 is connected to the connecting rod 59 and slides through the bolt 62, there being an adjusting nut be upon the rod (33 provided with a handle, and a jam nut ('35 to hold the adjusting nut in its adjusted position. An expansive spring 66 is mounted upon the extension 61 against the end of the connecting rod 59 to hold the connecting rod mechanism in its i\$ tll0 cam shaft 36 rotates the connecting rod mechanism 59' operates the lever 54- to operate the BCCGH' tric sleeve 3E) and td to move the compression feed rollers 47 and 48 to and fromeach other, and the binding metal 1 passes be-- tween the compression feed rollers and is drawn from the finishing and unwinding mechanism and fed to the folding mechanism, and the amount of metal fed at each cycle of the machine is determined by the relative lengths of the peripheral faces 57 and 58. The cam 56 adjustable as shown in Fig. 8 to change the relative lengths of the peripheral faces 57 and 58. The exteir sion block 57 has a tongu alal-groove connection with the end of the peripheral face 57, and the screw 57 inserted through an elongated slot in the block and screw-seated in the body of the cam forms a sliding connection for the block, so thatthe block forms an adjustable extension of the peripheral face 57, and by manipulating this extension the length of feed of the bini'ling metal 1 A retractile coil spring frame so as to hold the compression feed rollers normally separated or inactive, and so as to press the roller 60 against the cam 56, and when the roller (30 is against the surface 58 of the cam the con'ipression feed rollers 47 and .1-8 are open and inactive;and when the ram 536 turns and the roller (30 rides upon the surface 57 the con'lpression feed rollers 47 and 48 are moved toward each other to grip the binding metal. a pressure adjusting wedge 68, Fig. 20, beingsecuredto the frame by a bolt 69 in position to regulate the swing of the teeth 53 so as to regulate the pressure of the compression rollers upon the binding mctal. The wedge is adjusted by loosening the bolt and rotating the wedge slightly one way or the other and then tightening the bolt. When the connecting rod mechanism operatesto bring vthe rollers to exert the desired pressure upon the binding metal, the teeth 52-3 will press against the wedge 68 and the continued op eration of the cam 56 will press the spring, 6 and slide the extension 61 into the end of the connecting rod 59 and slide the rod 68 through the pi (52.

The connection between the connecting rod 59 and the lever 54 may be minutely ad usted by manipulat- 111g 65. It will be evident that as the binding the adjusting nut 6-1 and the jam nut metal is fed continuously from the-reel and as the mccl'ianism C feeds it intermittently, there is considerable slack in he strip when the intermittent means is stationary as shown in Fig. 2.

Suitable meansas the mechanism D may be provided for centering the fed binding metal and comprises the centering bars 70 and 71 mounted in position so that the binding metal 1 passes from the feed-rollers 47 and 48 between the bars 70 and 71. The bars are open as shown in Fig. 12 when the binding metal is moving and said bars are closed as shown in Fig. 13 during the operation of folding the fed binding metal lengthwise. This mechanism for centering the fed binding metal includes the connections from the driving shaft 10 to the bars 70 and 71 for opening and closing said bars.

To fold the centered binding metal lengthwise, I provide the mechanism E. This mechanism comprises a rigid inverted V- shaped folder member 72 and a reciprocating folder member 73, and the mechanism for operating the reciprocating 'fOldGi member from the driving shaft. The folder member 72 is formed upon or. attachedflto the face of the folder plate or bar 74, said folder plate being removably and rigidly secured to the frame by. bolts 75. The reciprocating folder member 73 is a thin strip of hardened stcelrinounted in a folder or bar 76 in opposition th the rigid member, and in turn this folder 7 6 is mounted in a reciprocating head 77., A recess or seat 78 is formed in the frame to receive the recipro eating head 77 so that the head rnay reciprocate from the open position of the folder as shown in Fig. 12 to the closed position of the folder as shown in Fig. l-l.

Three pairs of shafts 79 and 80 are mounted vertically in transverse alincment through the reciprocating head 77, and segmental gears 81 and 81' fixed upon the lower ends of the shafts 79 and 80 intermesh to connect the shafts together. Cranks 82 are fixed upon the upper ends of the shafts. and the centering bars 70 and 71 are mounted upon the pins of the cranks. The heads 83 84:, said set screws being seated in the gears 81 and set against the shaft 80 to hold the gears in place. Levers 85 are plvotally .mounted upon lag screws 86 seated in the frame, the upper ends of the lovers being bifurcated to slidingly mount the heads 83.

A connecting rod 87 is mounted through the 'are pivotally mounted upon the set screws 11 

